Abstract
It was attempted to evaluate nondestructively the creep damaged IN738LC Ni based superalloys with different degree of rafting using ultrasonic wave. Microstructural parameters (length and width of γ′ precipitates) and ultrasonic attenuation were measured in order to clarify the relationship between them. Both the mean length of γ′ precipitates and the ultrasonic attenuation increased with creep time. Ultrasonic attenuation was found to have a linear correlation with the mean length of γ′ precipitates. It is suggested that the ultrasonic attenuation can be used as a potential nondestructive parameter for assessing the degree of creep damage of IN738LC superalloy.
| Original language | English |
|---|---|
| Pages (from-to) | 569-572 |
| Number of pages | 4 |
| Journal | Materials Science Forum |
| Volume | 449-452 |
| Issue number | I |
| DOIs | |
| State | Published - 2004 |
| Event | Designing, Processing and Properties of Advanced Engineering Materials: Proceedings on the 3rd International Symposium on Designing, Processing and Properties of Advanced Engineering Materials - Jeju Island, Korea, Republic of Duration: 5 Nov 2003 → 8 Nov 2003 |
Keywords
- Creep damage
- IN738LC
- Nondestructive evaluation
- Rafting
- Ultrasonic attenuation